Most top-ranking websites fail HTML validation. Google explains why perfect code isn’t required, and what matters instead. Many top websites have invalid homepage HTML, yet still rank well ...

Google says images styled with CSS won’t be indexed in Image Search, advising developers to use HTML tags for important ...

Google's John Mueller confirmed on Twitter that it may be worth looking into compressing your HTML and CSS. He said "Sometimes minifying HTML & CSS can reduce the size of the files, so it can ...